JPH0426874B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a reciprocating electric shaver, and particularly to the structure of an outer cutter frame that holds outer cutters.

[Conventional technology]

Some reciprocating electric shavers have an outer blade with a large number of holes formed from a thin flexible metal plate and are attached to the outer blade frame in a curved state. Generally, as shown in Japanese Patent Application Laid-Open No. 62-97590, an outer cutter frame having an opening on the upper surface is provided, and the outer cutter is curved into the upper opening of the outer cutter frame. In addition, both ends of the outer cutter are latched to the inner surface of the outer cutter frame.

[Problem to be solved by the invention]

At this time, in order to widen the area where the blade hole is provided in the outer blade as much as possible to increase the cutting area of the beard, only the inner blade that is reciprocated and slides into contact with the inner surface of the outer blade is placed on the inner side of the outer blade. However, in this case, the length of the outer cutter frame in the longitudinal direction increases by the thickness of the outer cutter frame, making it impossible to achieve miniaturization and improve usability. If the thickness of the outer cutter frame is reduced, the size can be reduced, but this makes it difficult to provide sufficient strength to the outer cutter frame. The present invention has been made in view of these points, and its purpose is to focus on the existence of a region in which no cutter hole is formed in the outer cutter and to make this region overlap with the outer cutter frame. Thus, it is possible to provide a reciprocating electric shaver in which the outer cutter frame is made smaller while having sufficient strength.

[Means to solve the problem]

Therefore, the present invention includes an outer cutter frame including a pair of side walls that hold both ends of a curved outer cutter and a pair of end walls that connect both ends of the side walls, and this outer cutter frame has the following features: It is characterized in that the upper part of the end wall is formed in an arc shape along the curve of the outer cutter, and the end wall overlaps with the region where no cutter hole is formed at the side end of the outer cutter. [Function] According to the present invention, since the outer cutter frame overlaps with the peripheral portion of the outer cutter that does not contribute to shaving, the outer cutter frame can be made smaller without impairing the shaving performance and the strength of the outer cutter frame. It is possible to aim for [Example] The present invention will be described in detail below based on the illustrated example. The outer cutter 1, in which a large number of blade holes 10 are formed in the portion excluding the periphery, is formed of a thin flexible metal plate. A plurality of positioning holes 11 are provided at each end thereof. The outer cutter frame 2 in which the outer cutter 1 is disposed in the upper opening is formed of a holding frame 20 and a mounting frame 25 here. The holding frame 20 has a pair of side walls 20a, 2
0a and a pair of end walls 20b, 20b connecting these side walls 20a, 20a, and has a rectangular frame shape, and is provided with a plurality of positioning protrusions 21 and through holes 22 on the outside of each side wall 20a. With,
Each end wall 20b is provided with a connecting portion 23 on the outer surface thereof, and the outer cutter 1 has the positioning projections 21 of the holding frame 20 inserted into the positioning holes 11 at both ends thereof.
By covering each end portion with a thin plate-like attachment plate 3, it is attached to the holding frame 20 in a curved state. The mounting plate 3 here has holding frames 2 on both ends thereof.
0 through the through hole 22 and bent on the inner surface side of the holding frame 20.
The outer cutter 1 is held between the outer surface of the blade and the outer surface of the holding frame 20, and the surface facing the holding frame 20 is provided with grooves 31 for allowing the plurality of positioning protrusions 21 to escape.
Incidentally, since this groove 31 forms a protrusion on the surface side of the mounting plate 3, it also contributes to improving the strength of the mounting plate 3. On the other hand, the mounting frame 25 in the outer blade frame 2 is
A pair of side walls 25a, 25a and a pair of end walls 25b,
25b, which is attached to the main body 5 in which the motor and the driver 50 that converts the rotation of the motor into reciprocating motion are housed, and is formed on both end walls 25b, on the upper part of 25b. The connecting portion 23 provided on the holding frame 20 is inserted into the engaging groove 26 in which the holding frame 20 is inserted. When the connecting portion 23 is pressed, the hook 24 is also pushed in and moved inward to be removed from the locking claw 27, so that the holding frame 20 can be removed from the mounting frame 25. The inner cutter 4, which is composed of an inner cutter blade 40, a base 41, and a joint 42 and is attached to the drive element 50, is biased by a push-up spring (not shown) disposed inside the drive element 50. By slidingly contacting the inner surface of the outer cutter 1, the whiskers introduced into the interior through the blade hole 10 of the outer cutter 1 are cut. Now, in the outer cutter frame 2 which is composed of the mounting frame 25 and the holding frame 20 as described above, the walls at both ends in the reciprocating direction of the inner cutter are the end wall 25b of the mounting frame 25 and the end wall 25b of the mounting frame 25. Each end wall 20b of the holding frame 20 has a protrusion, which is a first protrusion, on its opposing surface. 35 and a protrusion 36 as a second protrusion that protrudes further than the protrusion, and has an arc shape along the curved outer cutter 1 attached to the outer cutter frame 2. A step having a step C is formed between the two protrusions 35 and 36. When the outer cutter 1 is attached to the holding frame 20, as shown in FIGS. 2 and 3, one surface of the protrusion 35 faces the inner surface of the blade hole-free region 1b on the edge of the outer cutter 1, Furthermore, one surface of the protrusion 36 is the blade hole 1 in the outer cutter 1.
It faces the inner surface of the region 1a where 0 is formed.
The protrusion 36 provides the holding frame 20 with strength against twisting when the connecting portion 23 is bent, and the distance between the protrusion 35 and the outer cutter 1 is smaller than the distance E between the protrusion 35 and the outer cutter 1. The distance D between the protrusion 36 and the outer blade 1 facing the area where the blade hole 10 exists is made larger to prevent hair from getting caught inside from the blade hole 10. That's why. When shaving, even if the outer cutter 1 sinks inward due to being pressed against the skin, the outer cutter 1 is received by the protrusion 35, and the outer cutter 1 and the protrusion 36, a space equal to the height difference C is ensured, so there is no chance of the beard getting caught in this case either. FIGS. 4 to 6 show a case where the outer cutter frame 2 is not formed of the mounting frame 25 and the holding frame 20 as described above, but is formed by integrating the two. . A pair of side walls 2a, 2a
and a pair of end walls 2b, 2b of the outer cutter frame 2. Projection 3
5 and the protrusion 36 function in exactly the same way as in the above embodiment. In addition, the outer cutter 1 shown here has a positioning hole 11
As shown in FIG. 7, a tongue-shaped elastic piece 17 is formed by forming a slit 16 on the edge of the mouth of the holder, as shown in FIG. As shown in FIG. 8, since the elastic piece 17 comes into elastic contact with the positioning protrusion 21, the outer cutter 1 is difficult to come off and the mounting plate 3
can be easily installed.

【Effect of the invention】

As described above, in the present invention, since the end wall of the outer cutter frame and the area where no cutter hole is formed at the side end of the outer cutter overlap, the thickness of the outer cutter frame can be ensured while the outer cutter frame can be made smaller. In addition, since the outer cutter overlaps with the end wall of the outer cutter frame in the non-formed area of the blade hole, which does not contribute to shaving, it does not reduce the shaving performance. Of course, there is no need for hair introduced through the blade hole to get caught between the outer cutter and the outer cutter frame without being cut, and furthermore, the end wall of the outer cutter frame is not cut by the outer cutter. Since the outer cutter is formed in an arc shape that follows the curve, the excessive load applied to the outer cutter is borne by the end wall of the outer cutter frame, and the outer cutter is not deformed. In addition, in overlapping the end wall of the outer cutter frame and the non-cutting hole forming area of the outer cutter, the first protrusion protruding from the end wall and the cutting hole non-forming area of the outer cutter are made to overlap. At the same time, if a second protrusion is provided on the end wall that protrudes further than the first protrusion and faces the cutter hole forming area of the outer cutter, the outer cutter frame will be reduced by the amount of the second protrusion. The thickness can be increased to further ensure the strength of the outer cutter frame, and the second protrusion has a step between it and the first protrusion. Therefore, due to the presence of the second protrusion, the whiskers that enter through the blade hole will not be caught.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of one embodiment of the present invention, FIG. 2 is a broken perspective view of the same, FIG. 3 is a sectional view of the same, FIG. 4 is an exploded perspective view of another embodiment, and FIG. 6 is a sectional view of the same as the above, FIG. 7 is a perspective view of the outer cutter of the above, and FIG. 8 is a sectional view of the outer cutter and the holding frame of the above; 1 is the outer cutter; 1a is a blade hole forming area, 1b is a blade hole non-forming area, 2 is an outer blade frame,
4 is the inner blade, 10 is the blade hole, 20a, 25a are the side walls,
20b and 25b are end walls, and 35 and 36 are protrusions.

Claims (1)

[Claims] 1. An outer cutter frame including a pair of side walls that hold both ends of a curved outer cutter and a pair of end walls that connect both ends of the side walls, and this outer cutter frame , the upper part of the end wall is formed in an arc shape along the curvature of the outer cutter, and the end wall and the region where no cutter hole is formed at the side end of the outer cutter overlap. Razor. 2 The end wall of the outer cutter frame has a first protrusion and this first
a second protrusion that protrudes further than the protrusion, one surface of the first protrusion faces the inner surface of the non-cutting hole forming area of the outer cutter, and is connected to the end wall of the outer cutter frame. Claim 1, characterized in that one surface of the second protrusion, which overlaps with the blade and has a step formed between it and the first protrusion, faces a region in which the blade hole is formed in the outer blade.
The reciprocating electric razor listed.